[Q] Nexus 5 is stuck on boot screen with the circles after automatically turning off topic

Left my phone to charge over night and woke it up finding it turned off. (You can imagine the shock!!)

I turned it on back and it has been stuck on the boot screen with the flying dots since then. (Annoyed!!)

When I go into recovery mode and try deleting cache or wipe data I get a lot of error messages saying can't mount cache/recovery/log

Can't unlock boatloader to flash stock. It keeps relocking upon each restart.

Each time I wipe I get these error messages.

Wiping data...
Formatting/data...
- hide quoted text -
E: Failed to mount/cache (Invalid argument)
E: Can't mount /cache/ recovery/log
E: Can't open/cache/ recovery/ log
E: Failed to mount/cache (Invalid argument)
E: Can't mount /cache/ recovery/last_log
E: Can't open/cache/ recovery /last_log
E: Failed to mount/cache (Invalid argument)
E: Can't mount /cache/ recovery/last_install
E: Can't open/cache/ recovery/ last_install
Data wipe complete
- hide quoted text -
E: Failed to mount/cache (Invalid argument)
E: Can't mount /cache/ recovery/log
E: Can't open/cache/ recovery/ log
E: Failed to mount/cache (Invalid argument)
E: Can't mount /cache/ recovery/last_log
E: Can't open/cache/ recovery /last_log
E: Failed to mount/cache (Invalid argument)
E: Can't mount /cache/ recovery/last_install
E: Can't open/cache/ recovery/ last_install
E: Failed to mount/cache (Invalid argument)

Can someone please help me. I am really frustrated. Please don't tell me it's a hardware problem....